protected override Snapshot WriteSnapshotImpl(Model model)
{
var bytes = _formatter.ToByteArray(model);
var snapshot = new Snapshot(DateTime.Now, model.Revision);
_state.Snapshots.Add(snapshot, bytes);
return snapshot;
}
protected override Snapshot WriteSnapshotImpl(Model model)
{
var fileSnapshot = new FileSnapshot(DateTime.Now, model.Revision);
var fileName = Path.Combine(_config.Location.OfSnapshots, fileSnapshot.Name);
using (Stream stream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
{
_formatter.Serialize(stream, model);
}
return fileSnapshot;
}
/// <summary>
/// Apply the command to the food taster. If it succeeds, apply to the real model.
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public override object ExecuteCommand(Command command)
{
try
{
command.PrepareStub(_foodTaster);
command.ExecuteStub(_foodTaster); //outofmemory,commandaborted, unhandled user
}
catch (CommandAbortedException)
{
throw;
}
catch (OutOfMemoryException)
{
throw;
}
catch (Exception ex)
{
_foodTaster = _formatter.Clone(Model); //reset
throw new CommandAbortedException("Royal taster died of food poisoning, see inner exception for details", ex);
}
return base.ExecuteCommand(command);
}
internal virtual void Redo(ref Model model)
{
PrepareStub(model);
ExecuteStub(model);
}
/// <summary> /// Perform read operations before the write lock is obtained. /// </summary> /// <param name="model"></param> internal abstract void PrepareStub(Model model);
internal abstract object ExecuteStub(Model model);
public RoyalFoodTaster(EngineConfiguration config, Model model)
: base(config, model)
{
_formatter = config.CreateFormatter(FormatterUsage.Snapshot);
_foodTaster = _formatter.Clone(Model);
}
public OptimisticKernel(EngineConfiguration config, Model model)
: base(config, model)
{
}
protected override Snapshot WriteSnapshotImpl(Model model, ulong lastAppliedEntryId)
{
var fileSnapshot = new FileSnapshot(DateTime.Now, lastAppliedEntryId);
var fileName = Path.Combine(_config.Location.OfSnapshots, fileSnapshot.Name);
using (Stream stream = GetWriteStream(fileName, append:false))
{
_snapshotFormatter.Serialize(stream, model);
}
return fileSnapshot;
}
public ImmutabilityKernel(EngineConfiguration config, Model model)
: base(config, model)
{
}
private void UnpackTuple(object tuple, out Model model, out object result)
{
var type = tuple.GetType();
model = (Model)type.GetProperty("Item1").GetGetMethod().Invoke(tuple, null);
result = type.GetProperty("Item2").GetGetMethod().Invoke(tuple, null);
}
internal override void PrepareStub(Model model)
{
throw new NotImplementedException();
}
internal override object ExecuteStub(Model model)
{
throw new NotImplementedException();
}